Spark-plug intensifier.



F. G. MEYER.

SPARK PLUG INTENSIHER. APPLICATION FILED FEB.8| ISIII.

l ,296,101 Patenwd Mar. 4,1919.

` irai) s FRED G. MEYER, 0F DETROIT, MICHIGAN.

SPARK-PLUG- IN TEN' SIFIER.

Spcification of Letters Patent.

Patented Mar. d, 1919.

Applicationuiea February s, 191s. serial No. 216,061.

e it known he county of Wayne and Sta e of Michigan, have invented a newand useful Sparklug Intensiier, of which the following is aspecification.

This invention relates to spark intensifiers especially adapted for usein the ignition circuits for the spark-plugsof internal combustionengines.

- he general object of the invention is to provide a comparativelysimple and eliicient containing a visible spark gap lfor introductionintol the ignition circuit and connecten with the spark-plug, which willthrough', said body is a should be equal to or ing the terminal of an he'either of serve to intensify the spark at the plug and enable thecondition thereof to be readily observed.

A special object of the present invention is to provide a device of thischaracter of improved structural formationin .which the parts will becomparatively few in number and extremely simple to machinel andassemble, and which as a whole will be readily attacliable, 'thoroughlyserviceable and efficient in operation `and less liable to breakage ordisarrangeinent than the usual devices of this c aracter.

Further objects and advantages will appear from the followingdescription of a preferred embodiment of the invention as illustrated inthe accompanying drawings, and in wvhich:

Figure 1 is a side elevation of dying my invention, s

ignition circuit cable with an ordinary spark plug.

Fig. 2 is a view in elevation of the body andend portions of the Vdevicedisengaged.

Referring to the several parts by theicharacters of reference leadingthereto, 41 represents a cylindrical barrel-sliaped body Imember ofinsulating material, which is pijfeiably formed of vulcanized rubber orard liber to render it substantially non-breakable, an inserted in aboformed axially transparent sleeve or tube'12iof insulating materialwhich may glass or sheets of mica rolled .the length of which slightlyless than that to form a cylinder j the body.

'Fjecting tongue 17 of the body so as not to protrude beyond the endsthereof.

Formed centrally and radially through 1 is a plurality of apertures 3which are intersected and abridged by the transparent sleeve 2 and formsight-.windows through which the interior thereof may be observed. Theends of this body member, y fianged4 respectively received are formedwith annuwhich are inclosing caps 4 and 5 lar shoulders 6 about whichthe fianges 7 of said caps are rolled or pressed into clam ingengagement to prevent withdrawal therefrom, and formed integral with theinnerfaces of said caps adjacent the flanges thereof are laterallyprojecting lugs 8'which are received by and interlocked Iwithregistering peripheral notches 9 formed in the shoulders 6 to retaintive rotation thereon.

Each of the caps 4 and 5 has formed integral with the innerface thereofa central laterally projecting hub 10, which hubs Vextend snugly intothe respective ends of the tube 2 so as to close and seal the ends ofsaid tube to form an air-tight chamber therein. Extending centrally fromthe hub il? to a point intermediate the ends larly anchored to extendthrough the cap 5 and its hub 10 into the tube 2 in axial alineform anpassage of a spark in thepassage of the electric current through saidouter end of the electrode The cap 4 is y prohaving an aperture 18therethrough for the reception of the binding post 19 and engagementwith the clamping-nut 20 of a spark plug 21, as shown in Fig. 1. By thismeans the device is con- 'the current passing thereto the spacingof theelectrodes to provi proper spark gap being predetermined andthere beingno provision for adjustment, disnected in the the device.

It will parts in the present sembled are securely be observed that theprincipal structure when 'asheld relatively fixed, 'de the i arrangementof the parts'through tamperin an air-tight chamber lparent tube and b yembracing which is comparatively fragile,

ing by unskilled users is avoided. It Will also appear within thetranssa'id tube, within the fibrous body provided with sight openings,said electrodes will be kept clean and free from any substances thatmight aHect their functioning, and the condition of the spark may bereadily observed through said openings, While the body' member will notonly serve to reinforce and protect said tube against breakage but .lsoaffords a strong, yet yieldable foundation upon which to firmly clenchthe end caps and securely tie the parts together.

I claim:

1. An electric-igniter intensifier comprising a cylindrical insulatingbody member having annular peripheral shoulders at opposite ends thereofand provided with an axial bore therethrough and a radial sight openingintersecting said bore intermediate said ends, a transparent memberabridging within said bore, a cap for said opening each end of said bodymember having a bendable flange for engagement with the shoulder thereofand provided with a hub portion extending into the bore -o'f said bodymember, and sparking electrodes respectively anchored in said caps andextending into said bore in spaced axial alinement adjacent saidopening.

2. An electric-igniter intensifier comprisin a cylindrical body memberhaving annu ar peripheral shoulders at opposite ends thereof andprovided with an axial bore therethrough and a radial sight openingintersecting said bore intermediate said ends, a transparent `insulatinsleeve extending through said bore and a ridging said sight opening, acap for each end of said body Copies of this patent may be obtained forthat by inclosing the electrodes v Afor the reception. of spark-plug,

five cents each, by addressing the Washington, D. C3?

-axial alinement adjacent said si ht opening.

3. An electric-igniter intensi er comprising a cylindrical insulatingbody member having an axial bore therethrough and a radial sight openingintersecting said bore, a transparent member abridging said opening, acap iixedly secured over each end of said `body member and having a hubportion extending into the end of said bore, one of said caps having anintegral laterally extending tongue provided with an aperture thebinding-post of a a sparking electrode anchored in the hub portion ofsaid cap and extending init-0 said b ore yin opening, a second sparkingelectrode spaced axially from said first named electrode and anchored toextend through the other of sai caps, the outer end of said secondelectrode bein screw-threaded and provided with a binding vnut forengagement with the terminal of an electric conductor. 4 4L Anelectric-igniter intensifier comprising a cylindrical insulating bodymember having .annular peripheral shoulders at opposite ends thereof andprovided with an axial bore therethrough and a radial sight -openingcommunicating with said bore, a

transparent insulating y sleeve extending through said bore andabridging said opening, a cap for each end of said body member having aflange engaging the shoulder thereof and provided with a hub portionextending into the end 'of said sleeve, one of said caps having anapertured tongue for engagement with a spark-plug, a sparking electrodeanchored in the hub portion of said cap and extending into said sleeveadjacent said sight opening, and a second sparking electrode spacedaxially from said rst named electrode and anchored to extend through theother of said caps, the outer end of said second electrode' beingscrew-threaded and provided with a' binding nut for engagement with theterminal of an electric conductor.

In testimony whereof I sign this specification. v

vFRED e. MEYER.

Commissioner of latents,

line with said sight -i dao'

